hi Murphy, good to see you're in the mood to make some positive changes. Your goals sound great.
I'm the other end of the process now and lost 30% of my bodyweight last year, and I feel fantastic, so can highly recommend it.
If you want to lose weight you really need to do it through eating less calories. That's it. Not by exercise. Exercise is obviously good for you and will improve your health, but i'd recommend tackling either the diet or both diet and exercise first up, ie don't expect heaps of exercise to make much difference if your diet's wonky.
Maybe think of some day-to-day goals - for example when you go to bed tonight reflect on at least one good choice you made today and congratulate yourself. Rinse and repeat

Once you start making positive choices it becomes a habit that you build on, and hey presto, you feel better and better about yourself (getting started
is tough though!).
Have a look around the threads because most of the activity is there - Chicks up for a Challenge are good ones - you can decide on your own targets or behaviours, tell us about them, and check in with your progress and get support from everyone. The short term specific stuff is more manageable and more motivating than a loose long-term goal, so it's good to have both. Good luck!!